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Article Dans Une Revue Annales de l'Institut Fourier Année : 2007

Small divisors and large multipliers

Boele Braaksma
  • Fonction : Auteur

Résumé

We study germs of singular holomorphic vector fields at the origin of $\Bbb C^n$ of which the linear part is $1$-resonant and which have a polynomial normal form. The formal normalizing diffeomorphism is usually divergent at the origin but there exists holomorphic diffeomorphisms in some "sectorial domains" which transform these vector fields into their normal form. In this article, we study the interplay between the small divisors phenomenon and the Gevrey character of the sectorial normalizing diffeomorphisms. We show that the Gevrey ordrer of the latter is linked to the diophantine type of the small divisors.

Dates et versions

hal-00632233 , version 1 (13-10-2011)

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Boele Braaksma, Laurent Stolovitch. Small divisors and large multipliers. Annales de l'Institut Fourier, 2007, 57 (2), pp.603-628. ⟨hal-00632233⟩
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